Design and Grasping Force Modeling for a Soft Robotic Gripper 
with Multi‑stem Twining

doi:10.1007/s42235-023-00371-9

Journal of Bionic Engineering ›› 2023, Vol. 20 ›› Issue (5): 2123-2134.doi: 10.1007/s42235-023-00371-9

Design and Grasping Force Modeling for a Soft Robotic Gripper with Multi‑stem Twining

Yu Shan1,2; Yanzhi Zhao1; Hongnian Yu2; Changlei Pei; Zhaopeng Jin1; Yue Sun1

1 School of Yanshan University, Qinhuangdao 066004, China 2 School of Computing, Engineering and the Built Environment, Edinburgh Napier University, 10 Colinton Road, Edinburgh EH10 5DT, UK

出版日期:2023-08-26 发布日期:2023-09-06
通讯作者: Yanzhi Zhao E-mail:yzzhao@ysu.edu.cn
作者简介:Yu Shan1,2; Yanzhi Zhao1; Hongnian Yu2; Changlei Pei; Zhaopeng Jin1; Yue Sun1

Design and Grasping Force Modeling for a Soft Robotic Gripper with Multi‑stem Twining

Yu Shan1,2; Yanzhi Zhao1; Hongnian Yu2; Changlei Pei; Zhaopeng Jin1; Yue Sun1

1 School of Yanshan University, Qinhuangdao 066004, China 2 School of Computing, Engineering and the Built Environment, Edinburgh Napier University, 10 Colinton Road, Edinburgh EH10 5DT, UK

Online:2023-08-26 Published:2023-09-06
Contact: Yanzhi Zhao E-mail:yzzhao@ysu.edu.cn
About author:Yu Shan1,2; Yanzhi Zhao1; Hongnian Yu2; Changlei Pei; Zhaopeng Jin1; Yue Sun1

摘要/Abstract

摘要： To improve the grasping power of soft robots, inspired by the scene of intertwined and interdependent vine branches safely clinging to habitats in a violent storm and the phenomenon of large grasping force after being entangled by aquatic plants, this paper proposes a soft robotic gripper with multi-stem twining. The proposed robotic gripper can realize a larger contact area of surrounding or containing object and more layers of a twining object than the current twining gripping methods. It not only retains the adaptive advantages of twining grasping but also improves the grasping force. First, based on the mechanical characteristics of the multi-stem twining of the gripper, the twining grasping model is developed. Then, the force on the fiber is deduced by using the twining theory, and the axial force of the gripper is analyzed based on the equivalent model of the rubber ring. Finally, the torsion experiments of fibers and the grasping experiments of the gripper are designed and conducted. The torsion experiment of fibers verifies the influence of a different number of fiber ropes and fiber torque on the grasping force, and the grasping experiment reflects the large load of the gripper and the high adaptability and practicability under different tasks.

关键词: , Soft robotic gripper , · Multi-stem twining , · Adaptability , · Grasping force model

Abstract: To improve the grasping power of soft robots, inspired by the scene of intertwined and interdependent vine branches safely clinging to habitats in a violent storm and the phenomenon of large grasping force after being entangled by aquatic plants, this paper proposes a soft robotic gripper with multi-stem twining. The proposed robotic gripper can realize a larger contact area of surrounding or containing object and more layers of a twining object than the current twining gripping methods. It not only retains the adaptive advantages of twining grasping but also improves the grasping force. First, based on the mechanical characteristics of the multi-stem twining of the gripper, the twining grasping model is developed. Then, the force on the fiber is deduced by using the twining theory, and the axial force of the gripper is analyzed based on the equivalent model of the rubber ring. Finally, the torsion experiments of fibers and the grasping experiments of the gripper are designed and conducted. The torsion experiment of fibers verifies the influence of a different number of fiber ropes and fiber torque on the grasping force, and the grasping experiment reflects the large load of the gripper and the high adaptability and practicability under different tasks.

Key words: , Soft robotic gripper , · Multi-stem twining , · Adaptability , · Grasping force model

Yu Shan, Yanzhi Zhao, Hongnian Yu, Changlei Pei, Zhaopeng Jin, Yue Sun . Design and Grasping Force Modeling for a Soft Robotic Gripper with Multi‑stem Twining[J]. Journal of Bionic Engineering, 2023, 20(5): 2123-2134.

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Design and Grasping Force Modeling for a Soft Robotic Gripper with Multi‑stem Twining

Design and Grasping Force Modeling for a Soft Robotic Gripper with Multi‑stem Twining

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